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Add 84/21 and 27/12

1st number: 4 0/21, 2nd number: 2 3/12

84/21 + 27/12 is 25/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 12 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    84/21 = 84 × 4/21 × 4 = 336/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    27/12 = 27 × 7/12 × 7 = 189/84
  4. Add the two fractions:
    336/84 + 189/84 = 336 + 189/84 = 525/84
  5. After reducing the fraction, the answer is 25/4
  6. In mixed form: 61/4

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